Anti-malarial drugs are as good as essential and advice should be sought at least a few weeks in advance to be sure you use suitable medication. At the same time, check which (if any) vaccinations require updating. All over-the-counter medications are available at pharmacies in the larger cities, but not in game reserves or more isolated beach destinations, so best to buy any prescription drugs or others that you use regularly before you travel, along with essentials such as sunblock and insect repellent. People who wear contact lenses often find that their eyes are more irritable in the dry heat typical of many safari destinations, so it is a good idea to bring glasses as a backup.